从对象中获取字段

Question

我收集了 Country 字段：name、aaa、bbb、ccc、ddd。

例子：

{_id: xxx1, name: "USA", aaa: "daf", ccc: "sdfgsdf", ddd: "234"}
{_id: xxx2, name: "Mexico", aaa: "dfg", bbb: "fdsgsdf"}
{_id: xxx3, name: "Germany", bbb: "ddfgaf"}
{_id: xxx4, name: "France"}

在我的 Symfony 应用程序的控制器中，我将所有对象获取到变量 $countries 和下一个：

foreach ($countries as $country) {
    //how can I get here fields for current object? 
    //For _id: xxx1 I would like receive "_id, name, aaa, ccc, ddd" and for _id: xxx4 I would like receive "_id, name"
}

Answer 1

您可以在 foreach 中使用 get_object_vars() 和 array_keys()。

foreach ($countries as $country) {
   $fields = array_keys(get_object_vars($country)); 
}